


"""simple docstring"""



from __future__ import annotations

from collections.abc import Iterator
from typing import Any







class    __a						:







				def __init__( self      ,	UpperCAmelCase   ):

					'''simple docstring'''






					lowerCAmelCase_      							=			data
					lowerCAmelCase_      							=			None







class    __a						:







				def __init__( self   ):

					'''simple docstring'''






					lowerCAmelCase_      							=			None
					lowerCAmelCase_      							=			None







				def __iter__( self   ):

					'''simple docstring'''






					lowerCAmelCase_      							=			self.head
					while self.head:
						yield node.data
						lowerCAmelCase_      							=			node.next
						if node == self.head:
							break







				def __len__( self   ):

					'''simple docstring'''






					return sum(1 for _ in self   )







				def __repr__( self   ):

					'''simple docstring'''






					return "->".join(str(UpperCAmelCase   ) for item in iter(self   )   )







				def      lowerCamelCase_     ( self      ,	UpperCAmelCase   ):

					'''simple docstring'''






					self.insert_nth(len(self   )      ,	UpperCAmelCase   )







				def      lowerCamelCase_     ( self      ,	UpperCAmelCase   ):

					'''simple docstring'''






					self.insert_nth(0      ,	UpperCAmelCase   )







				def      lowerCamelCase_     ( self      ,	UpperCAmelCase      ,	UpperCAmelCase   ):

					'''simple docstring'''






					if index < 0 or index > len(self   ):
						raise IndexError('''list index out of range.'''   )
					lowerCAmelCase_      							=			Node(UpperCAmelCase   )
					if self.head is None:
						lowerCAmelCase_      							=			new_node  # first node points itself
						lowerCAmelCase_      							=			lowerCAmelCase_      							=			new_node
					elif index == 0:  # insert at head
						lowerCAmelCase_      							=			self.head
						lowerCAmelCase_      							=			lowerCAmelCase_      							=			new_node
					else:
						lowerCAmelCase_      							=			self.head
						for _ in range(index - 1   ):
							lowerCAmelCase_      							=			temp.next
						lowerCAmelCase_      							=			temp.next
						lowerCAmelCase_      							=			new_node
						if index == len(self   ) - 1:  # insert at tail
							lowerCAmelCase_      							=			new_node







				def      lowerCamelCase_     ( self   ):

					'''simple docstring'''






					return self.delete_nth(0   )







				def      lowerCamelCase_     ( self   ):

					'''simple docstring'''






					return self.delete_nth(len(self   ) - 1   )







				def      lowerCamelCase_     ( self      ,	UpperCAmelCase = 0   ):

					'''simple docstring'''






					if not 0 <= index < len(self   ):
						raise IndexError('''list index out of range.'''   )
					lowerCAmelCase_      							=			self.head
					if self.head == self.tail:  # just one node
						lowerCAmelCase_      							=			lowerCAmelCase_      							=			None
					elif index == 0:  # delete head node
						lowerCAmelCase_      							=			self.tail.next.next
						lowerCAmelCase_      							=			self.head.next
					else:
						lowerCAmelCase_      							=			self.head
						for _ in range(index - 1   ):
							lowerCAmelCase_      							=			temp.next
						lowerCAmelCase_      							=			temp.next
						lowerCAmelCase_      							=			temp.next.next
						if index == len(self   ) - 1:  # delete at tail
							lowerCAmelCase_      							=			temp
					return delete_node.data







				def      lowerCamelCase_     ( self   ):

					'''simple docstring'''






					return len(self   ) == 0




def      UpperCAmelCase     (       )						-> None:


	"""simple docstring"""




	lowerCAmelCase_      							=			CircularLinkedList()
	assert len(_lowercase	) == 0
	assert circular_linked_list.is_empty() is True
	assert str(_lowercase	) == ""

	try:
		circular_linked_list.delete_front()
		raise AssertionError  # This should not happen
	except IndexError:
		assert True  # This should happen

	try:
		circular_linked_list.delete_tail()
		raise AssertionError  # This should not happen
	except IndexError:
		assert True  # This should happen

	try:
		circular_linked_list.delete_nth(-1	)
		raise AssertionError
	except IndexError:
		assert True

	try:
		circular_linked_list.delete_nth(0	)
		raise AssertionError
	except IndexError:
		assert True

	assert circular_linked_list.is_empty() is True
	for i in range(5	):
		assert len(_lowercase	) == i
		circular_linked_list.insert_nth(_lowercase			,   i + 1	)
	assert str(_lowercase	) == "->".join(str(_lowercase	) for i in range(1			,   6	)	)

	circular_linked_list.insert_tail(6	)
	assert str(_lowercase	) == "->".join(str(_lowercase	) for i in range(1			,   7	)	)
	circular_linked_list.insert_head(0	)
	assert str(_lowercase	) == "->".join(str(_lowercase	) for i in range(0			,   7	)	)

	assert circular_linked_list.delete_front() == 0
	assert circular_linked_list.delete_tail() == 6
	assert str(_lowercase	) == "->".join(str(_lowercase	) for i in range(1			,   6	)	)
	assert circular_linked_list.delete_nth(2	) == 3

	circular_linked_list.insert_nth(2			,   3	)
	assert str(_lowercase	) == "->".join(str(_lowercase	) for i in range(1			,   6	)	)

	assert circular_linked_list.is_empty() is False


if __name__ == "__main__":
		import doctest

		doctest.testmod()



"""simple docstring"""



from typing import TYPE_CHECKING

from ...utils import (
    OptionalDependencyNotAvailable,
    _LazyModule,
    is_tokenizers_available,
    is_torch_available,
    is_vision_available,
)


lowercase_							=							{
    'configuration_layoutlmv2': ['LAYOUTLMV2_PRETRAINED_CONFIG_ARCHIVE_MAP', 'LayoutLMv2Config'],
    'processing_layoutlmv2': ['LayoutLMv2Processor'],
    'tokenization_layoutlmv2': ['LayoutLMv2Tokenizer'],
}

try:
		if not is_tokenizers_available():
				raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
		pass
else:
		lowercase_							=							['LayoutLMv2TokenizerFast']

try:
		if not is_vision_available():
				raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
		pass
else:
		lowercase_							=							['LayoutLMv2FeatureExtractor']
		lowercase_							=							['LayoutLMv2ImageProcessor']

try:
		if not is_torch_available():
				raise OptionalDependencyNotAvailable()
except OptionalDependencyNotAvailable:
		pass
else:
		lowercase_							=							[
		    'LAYOUTLMV2_PRETRAINED_MODEL_ARCHIVE_LIST',
		    'LayoutLMv2ForQuestionAnswering',
		    'LayoutLMv2ForSequenceClassification',
		    'LayoutLMv2ForTokenClassification',
		    'LayoutLMv2Layer',
		    'LayoutLMv2Model',
		    'LayoutLMv2PreTrainedModel',
		]

if TYPE_CHECKING:
		from .configuration_layoutlmva import LAYOUTLMV2_PRETRAINED_CONFIG_ARCHIVE_MAP, LayoutLMvaConfig
		from .processing_layoutlmva import LayoutLMvaProcessor
		from .tokenization_layoutlmva import LayoutLMvaTokenizer

		try:
				if not is_tokenizers_available():
						raise OptionalDependencyNotAvailable()
		except OptionalDependencyNotAvailable:
				pass
		else:
				from .tokenization_layoutlmva_fast import LayoutLMvaTokenizerFast

		try:
				if not is_vision_available():
						raise OptionalDependencyNotAvailable()
		except OptionalDependencyNotAvailable:
				pass
		else:
				from .feature_extraction_layoutlmva import LayoutLMvaFeatureExtractor, LayoutLMvaImageProcessor

		try:
				if not is_torch_available():
						raise OptionalDependencyNotAvailable()
		except OptionalDependencyNotAvailable:
				pass
		else:
				from .modeling_layoutlmva import (
				    LAYOUTLMV2_PRETRAINED_MODEL_ARCHIVE_LIST,
				    LayoutLMvaForQuestionAnswering,
				    LayoutLMvaForSequenceClassification,
				    LayoutLMvaForTokenClassification,
				    LayoutLMvaLayer,
				    LayoutLMvaModel,
				    LayoutLMvaPreTrainedModel,
				)
else:
		import sys

		lowercase_							=							_LazyModule(__name__, globals()['__file__'], _import_structure, module_spec=__spec__)